Heat lightning can also occur if cloud-to-ground lightning occurs very far away and the sound dissipates before it reaches the observer. At night, it is possible to see the flashes of lightning from very far distances, up to 100 miles, but the sound does not carry that far.
Fungal Grotto is a 4-man dungeon in Elder Scrolls Online. It is located all the way at the western edge of Stonefalls.
The Basilica of Lourdes, France (Enlarge) While no firm evidence exists to indicate that the grotto of Lourdes was a sacred place in ancient times, there is a healing energy present that has made the site, in only 140 years, the most visited pilgrimage shrine in all Christendom.